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Finding the Fourth Proportional to 19,991.88, 27,591.22 and 11,608.38

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Solution

The fourth proportional to 19,991.88, 27,591.22 and 11,608.38 is: 16,020.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,991.88 : 27,591.22 = 11,608.38 : x
  2. Step 2: Convert to fraction form
    19,991.88/27,591.22 = 11,608.38/x
  3. Step 3: Cross multiply
    19,991.88x = 27,591.22 × 11,608.38
  4. Step 4: Simplify right side
    19,991.88x = 320,289,366.42
  5. Step 5: Solve for x
    x = 320,289,366.42/19,991.88
  6. Step 6: Final answer
    x = 16,020.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.